package com.gl.portal.common;

import com.gl.common.constant.Constants;
import com.gl.common.constant.RedisConstants;
import com.gl.common.util.redis.RedisUtils;
import com.gl.common.util.sign.Base64;
import com.gl.common.util.uuid.IdUtils;
import com.gl.framework.core.exception.BizException;
import com.gl.framework.properties.ProjectProperties;
import com.gl.framework.web.response.ResultCode;
import com.google.code.kaptcha.Producer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 验证码控制器
 */
@RestController
public class CaptchaController {
	private static final Logger log = LoggerFactory.getLogger(CaptchaController.class);

	@Autowired
	private ProjectProperties projectProperties;

	@Resource(name = "captchaProducer")
	private Producer captchaProducer;

	@Resource(name = "captchaProducerMath")
	private Producer captchaProducerMath;

	@Autowired
	private RedisUtils redisUtils;

	/**
	 * 生成验证码
	 */
	@GetMapping("/captcha_image")
	public Map<String, Object> getCode(HttpServletResponse response) throws IOException {
		// 保存验证码信息
		String uuid = IdUtils.simpleUUID();
		String verifyKey = RedisConstants.CAPTCHA_CODE_KEY + uuid;

		String capStr = null, code = null;
		BufferedImage image = null;

		// 验证码类型
		String captchaType = projectProperties.getCaptchaType();

		// 生成验证码
		if ("math".equals(captchaType)) {
			String capText = captchaProducerMath.createText();
			capStr = capText.substring(0, capText.lastIndexOf("@"));
			code = capText.substring(capText.lastIndexOf("@") + 1);
			image = captchaProducerMath.createImage(capStr);
		} else if ("char".equals(captchaType)) {
			capStr = code = captchaProducer.createText();
			image = captchaProducer.createImage(capStr);
		}
		log.info("code:"+code);
		log.info("uuid:"+uuid);
		redisUtils.set(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
		// 转换流信息写出
		FastByteArrayOutputStream os = new FastByteArrayOutputStream();
		try {
			ImageIO.write(image, "jpg", os);
		} catch (IOException e) {
			log.error(e.getMessage(), e);
			throw new BizException(ResultCode.FAIL.getCode(), e.getMessage());
		}

		Map<String, Object> map = new HashMap<String, Object>();

		map.put("uuid", uuid);
		map.put("img", Base64.encode(os.toByteArray()));

//		ResultEntity result = ResultEntity.success();
//		result.put("uuid", uuid);
//		result.put("img", Base64.encode(os.toByteArray()));
		return map;
	}

}
